Steerable and Agile Light-Fueled Rolling Locomotors by Curvature-Engineered Torsional Torqueopen access
- Authors
- Choi, Jun-Chan; Jeon, Jisoo; Lee, Jae-Won; Nauman, Asad; Lee, Jae Gyeong; Cho, Woongbi; Lee, Chanwoo; Cho, Young-Min; Wie, Jeong Jae; Kim, Hak-Rin
- Issue Date
- Oct-2023
- Publisher
- WILEY
- Keywords
- amphibious multimodal actuation; helical soft robot; liquid crystal polymer network; on-demand steering; photo-mechanical rolling
- Citation
- ADVANCED SCIENCE, v.10, no.30, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED SCIENCE
- Volume
- 10
- Number
- 30
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192963
- DOI
- 10.1002/advs.202304715
- Abstract
- On-demand photo-steerable amphibious rolling motions are generated by the structural engineering of monolithic soft locomotors. Photo-morphogenesis of azobenzene-functionalized liquid crystal polymer networks (azo-LCNs) is designed from spiral ribbon to helicoid helices, employing a 270° super-twisted nematic molecular geometry with aspect ratio variations of azo-LCN strips. Unlike the intermittent and biased rolling of spiral ribbon azo-LCNs with center-of-mass shifting, the axial torsional torque of helicoid azo-LCNs enables continuous and straight rolling at high rotation rates (≈720 rpm). Furthermore, center-tapered helicoid structures with wide edges are introduced for effectively accelerating photo-motilities while maintaining directional controllability. Irrespective of surface conditions, the photo-induced rotational torque of center-tapered helicoid azo-LCNs can be transferred to interacting surfaces, as manifested by steep slope climbing and paddle-like swimming multimodal motilities. Finally, the authors demonstrate continuous curvilinear guidance of soft locomotors, bypassing obstacles and reaching desired destinations through real-time on-demand photo-steering.
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